package cn.bugstack.domain.strategy.service.rule.chain.impl;

import cn.bugstack.domain.strategy.repository.IStrategyRepository;
import cn.bugstack.domain.strategy.service.armory.IStrategyDispatch;
import cn.bugstack.domain.strategy.service.rule.chain.AbstractLogicChain;
import cn.bugstack.domain.strategy.service.rule.chain.factory.DefaultChainFactory;
import cn.bugstack.types.common.Constants;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;

import javax.annotation.Resource;
import java.util.*;

/**
 * @author Lenovo
 * @version 1.0
 * @description: 权重责任链
 * @date 2025/5/20 21:22
 */
@Slf4j
@Component("rule_weight")
public class RuleWeightLogicChain extends AbstractLogicChain {

    @Resource
    private IStrategyRepository repository;

    @Resource
    protected IStrategyDispatch strategyDispatch;

    public Long userScore = 0L;

    @Override
    public DefaultChainFactory.StrategyAwardVO logic(String userId, Long strategyId) {

        log.info("抽奖责任链-权重开始 userId: {} strategyId: {} ruleModel: {}", userId, strategyId, ruleModel());

        String ruleValue = repository.queryStrategyRuleValue(strategyId, ruleModel());

        //1.根据用户ID查询用户抽奖消耗的积分值
        Map<Long, String> analyticalValueGroup = getAnalyticalValue(ruleValue);
        if (null == analyticalValueGroup || analyticalValueGroup.isEmpty()) {
            return null;
        }

        //2. 转换Keys值，并默认排序
        List<Long> analyticalSortedKeys = new ArrayList<>(analyticalValueGroup.keySet());
        Collections.sort(analyticalSortedKeys);

        //3. 找出最小符合的值
        Long nextValue = analyticalSortedKeys.stream()
                .sorted(Comparator.reverseOrder())
                .filter(analyticalSortedKeyValue -> userScore >= analyticalSortedKeyValue)
                .findFirst()
                .orElse(null);

        if (null != nextValue ) {
            Integer randomAwardId = strategyDispatch.getRandomAwardId(strategyId, analyticalValueGroup.get(nextValue));
            log.info("抽奖责任链-权重接管 userId: {} strategyId: {} ruleModel: {} awardId: {}", userId, strategyId, ruleModel(), randomAwardId);
            return DefaultChainFactory.StrategyAwardVO.builder()
                    .awardId(randomAwardId)
                    .logicModel(ruleModel())
                    .build();
        }
        // 5. 过滤其他责任链
        log.info("抽奖责任链-权重放行 userId: {} strategyId: {} ruleModel: {}", userId, strategyId, ruleModel());
        return next().logic(userId, strategyId);

    }

    private Map<Long, String> getAnalyticalValue(String ruleValue) {
        String[] ruleValueGroup = ruleValue.split(Constants.SPACE);
        Map<Long, String> ruleValueMap = new HashMap<>();
        for (String ruleValueKey : ruleValueGroup) {
            // 1. 检查输入是否为空
            if (ruleValueKey == null || ruleValueKey.isEmpty()) {
                return  ruleValueMap;
            }
            // 2.分割字符串以获取键和值
            String[] parts = ruleValueKey.split(Constants.COLON);
            if (parts.length != 2){
                throw new IllegalArgumentException("rule_weight rule_rule invalid input format : " + ruleValueKey);
            }
            ruleValueMap.put(Long.parseLong(parts[0]), ruleValueKey);
        }
        return ruleValueMap;
    }

    @Override
    protected String ruleModel() {
        return DefaultChainFactory.LogicModel.RULE_WEIGHT.getCode();
    }
}
